Cheap Flight Tickets from Washington (DCA) to Ontario (ONT), Starting at $225

Good to Know: Cheapest and Fastest DCA - ONT Flights

Useful information for finding best airline tickets from Ronald Reagan Washington National to Ontario International on your next trip.

Cheapest Round Trip Flight

$553

WN Southwest Airlines • 1 stop • 11h 40m

Jun 24 – Jun 28

The cheapest round trip flight from Washington to Ontario (DCA-ONT-DCA) is currently $553

🔍 Search Flights

Cheapest One way Flight

$225

AA American Airlines • 1 stop • 12h 38m

Jun 27

The cheapest one way flight from Washington to Ontario (DCA-ONT) is currently $225

🔍 Search Flights

Fastest Flight

11h 40m

The fastest nonstop flight from Washington to Ontario (DCA-ONT) takes 11h 40m

Top Airlines Flying from Washington to Ontario

Southwest Airlines-WN

Southwest Airlines

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

American Airlines, AA

American Airlines

Alaska Airlines -AS

Alaska Airlines

Latest Flight Deals from Washington (DCA) to Ontario (ONT)

Compare and book low fare round-trip air tickets from Washington to Ontario. Ideal for travelers with confirmed return itineraries.

Jun 24 - Jun 28, Economy
WN
Washington → Ontario
11h 40m
6:35 PM - 10:35 PM • 1 stop
WN
Washington → Ontario
10h 55m
6:35 AM - 4:30 PM • 1 stop
$553
Southwest Airlines
Jun 24 - Jun 28, Economy
DL
Washington → Ontario
12h 20m
6:00 AM - 10:40 AM • 1 stop
DL
Washington → Ontario
8h 20m
7:35 AM - 3:35 PM • nonstop
$553
Delta Airlines
Jun 24 - Jun 28, Economy
DL
Washington → Ontario
12h 20m
6:00 AM - 10:40 AM • 1 stop
DL
Washington → Ontario
12h
7:05 AM - 5:25 PM • 1 stop
$562
Delta Airlines
Jun 24 - Jun 28, Economy
DL
Washington → Ontario
15h 13m
12:17 PM - 6:30 PM • 1 stop
DL
Washington → Ontario
12h 3m
8:10 AM - 6:33 PM • 1 stop
$562
Delta Airlines
Jun 24 - Jun 28, Economy
DL
Washington → Ontario
12h 28m
1:42 PM - 6:30 PM • 1 stop
DL
Washington → Ontario
11h 57m
10:20 PM - 8:37 AM • 1 stop
$562
Delta Airlines
Jun 24 - Jun 28, Economy
UA
Washington → Ontario
12h 13m
4:13 PM - 8:46 PM • 1 stop
UA
Washington → Ontario
11h 40m
5:00 AM - 3:00 PM • 1 stop
$680
United Airlines

Fly from Washington to Ontario with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Washington to Ontario? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Washington to Ontario Flights

What are the airports in Washington?
IAD,BWI,DCA
What’s the most popular airline flying from DCA to ONT?
The most popular airline flying from Washington to Ontario are
Can I fly from DCA to ONT non-stop?
NO
Which airlines fly nonstop between Washington and Ontario?
The non-stop flights between Washington and Ontario are .
What’s the earliest departure time from DCA to ONT Airport?
The earliest flight leaves DCA at 6:00 am and lands in ONT - Ontario International
What are the airports in Ontario?
ONT
Can I make changes to my Washington to Ontario flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from DCA to ONT?
Read the fare rules of the Washington to Ontario air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Washington and Ontario?
operate flights between Washington and Ontario
How long does a flight from Washington to Ontario take?
It takes approximately 5 hour to fly non-stop from DCA to ONT, which is 2264.8 miles by air.
Which airlines provide the cheapest flights from Washington (DCA) to Ontario (ONT) ?
In the past couple of days, the cheapest tickets to ONT from DCA were found on WN : USD 1144
Do I need a passport to fly between DCA and ONT?
No
What’s the latest departure time from DCA to ONT ?
The last flight leaves DCA at 6:35 pm

Essential Information for Booking Flights from Washington (DCA) - AI Insights

What's the cheapest airline from dca to ont?
Frontier Airlines offers budget-friendly flights from Ronald Reagan Washington National Airport (DCA) to Ontario International Airport (ONT). As a one-way trip, you can expect affordable fares. Booking in advance is recommended as it's cheaper when done 35 days prior to your travel date.
What's the popular airline to fly from dca to ont?
You can fly from Ronald Reagan Washington National Airport (DCA) to Ontario International Airport (ONT) on Delta Airlines. As you are booking a one-way trip, you'll have a direct flight without any stops. To find the best airfares for your travel plans, we recommend searching at least 35 days in advance. You can look for cheap airline tickets and budget-friendly flights on our website to plan your trip.
What's the cheapest day of the week to fly from dca to ont?
The cheapest day to fly from Ronald Reagan Washington National Airport (DCA) to Ontario International Airport (ONT) is Wednesday. Flying on this day can help you find budget-friendly flights. You can search for airfares and compare prices across airlines to get the best deals.
What's the cheapest month to fly from dca to ont?
The cheapest month to fly from DCA to ONT is November. Flying during this time can result in low fares and budget-friendly flights. You can find airfares that fit your budget by booking in advance, ideally 35 days prior to your trip.
Which airline/airlines fly from dca to ont?
Frontier Airlines (F9), Alaska Airlines (AS), United Airlines (UA), Southwest Airlines (WN), Delta Airlines (DL), JetBlue Airways (B6), American Airlines (AA) offer flights from Ronald Reagan Washington National Airport (DCA) to Ontario International Airport (ONT). You can find the best airfare deals and book your flight in advance, ideally 35 days prior to your trip.
What is the cheapest airline to fly from Ronald Reagan Washington National Airport (DCA) to Ontario International Airport (ONT)?
Frontier Airlines (F9)
How far in advance should I book my airfare for the best deals?
It's recommended to book your airfare at least 35 days in advance for the best prices.
Can I find cheap flights on your website for a one-way trip?
Yes, we offer affordable one-way flights on our website.
Is it possible to get a direct flight from DCA to ONT?
Unfortunately, there are no direct flights available from Ronald Reagan Washington National Airport (DCA) to Ontario International Airport (ONT).
What is the agency's policy on booking changes or cancellations?
Please contact our customer service team for more information on booking changes and cancellations.
When are the cheapest airfares available for July travel?
The cheapest airfares for July travel can be found during the month of November, with prices starting from $X.
How can I make the most of my weekend getaway with flights and accommodations?
Consider booking a weekend package deal on our website to get the best value for your money.

Washington (DCA) to Ontario (ONT): Airport Information

Origin Airport Ronald Reagan Washington National , Washington, US
Destination Airport Ontario International , Ontario, US
Distance 2265 miles

More Flight Options for Washington (DCA) and Ontario (ONT)

Why Fareleaders for DCA to ONT Plane Tickets

Lowest Prices
Lowest Prices
Uncover the best deals on Washington to Ontario flights by comparing fares from hundreds of airlines and agencies.
New Deals
New Deals Everyday
Get the best prices on DCA to ONT flights—we update our fares daily so you never miss a saving.
Best Travel Options
No Service Fees
Compare hundreds of Washington to Ontario flights and secure the best deals—we never add any service fees.
Get Fare Drop Alert
Be the first to know when fares drop for the Washington (DCA) to Ontario (ONT)
Terms and Conditions*